In my opinion the clue is in the fake letter of employment.
He must have heard of the names of the owners of that jute company somehow, from an employee. Beadle speculates they would have been working around Popular at this time, a short walk from Bury's lodgings in Bow.
Of note from the trial notes was that he wasn't particular open about where he was going to either, told his landlord he was going to Australia.
I'm not convinced - there has to be a sound reason why he picked Dundee...it's not exactly an obvious destination - this is an intelligent man with a reasonable education after all....he doesn't seem to do things without some degree of reason - It's just that so far, in this case, we don't seem to know it...
We cannot even be sure, factually, why he left London at all...we can speculate (and most of us have one way or the other - the obvious reason being to kill Ellen and grab her remaining inheritance from the basket, without her suspicious sister knowing)...but we still don't know for sure...
As johns says
Whichever town Bury and Ellen went to would have the same end result.
Why Huddersfield? Why Truro? Why Droitwich? and so on and so forth.
To my mind there has to be some reason we simply don't know about yet....
I generally dont like this Berry bashing ive seen in the past, i think he was a great man, contributing as much as he did to humane exectutions.
But his description of bury's hanging does trouble me because he didnt mention him in his book 'my experinces as an executioner' which he wrote before this - (not in the first edition i dug out of the britsih libary at any rate), he mentioned it afterwards in this newspaper report- so why didnt he put it in his book??? if he was that certain he was jack the ripper.
If Berry’s account is legitimate, my best guess would be that the two detectives told him to keep his mouth shut about what they’d said to him. This could have led Berry to steer clear of the topic entirely in his book, which was published in 1892, I think, not all that long after the murders.
Berry took a keen interest in his “victims” and it’s hard to believe he could have left Dundee without having become aware of the local chatter that Bury was possibly the Ripper. Even if the conversation with the two detectives never took place, Berry, then, would have had the opportunity to work “Jack the Ripper” into his book, which would have raised the profile of the book and no doubt would have helped sales. He could have simply approached it along the lines of “There was this talk in town that Bury might be the Ripper, and here is my impression of the man.” The fact that Berry was stone cold silent about Bury in his book, when the book includes vignettes about other “victims,” is something that I think is interesting.